Compilare: user.cpp: In function ‘int main()’: user.cpp:26:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &t, &n, &m); ^ user.cpp:30:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c", &a[i][j]); ^ user.cpp:103:48: warning: ‘ansch’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(f, "%d %d\n%c\n", ansl, ansc, ansch); ^ user.cpp:24:10: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] int t, ans, x, y, crmax, max; ^